KR100471385B1 - Purification apparatus and process for streamwater using Pearlite attached Polyethylene Net and Bulged Polypropylene media - Google Patents

Abstract

The polluted river water purification apparatus using the pearlite-attached polyethylene network media and the expanded polypropylene media according to the present invention is a river water purification apparatus for the high concentration polluted river water purification composed of a sedimentation tank, a biofilm reaction tank, and a biofilm filtration tank. In order to increase the porosity and the specific surface area, a module loaded with a pearlite-attached polyethylene network medium, in which pearlite is attached between polyethylene nets, is installed, and the biofilm reactor is a stepwise step of supplying air from the front end face of each module. Method, the biofilm filtration tank is characterized in that the filtration tank having a physical filtration function by filling the expanded polypropylene filter medium in the existing sedimentation basin.

In the polluted river water purification apparatus using the pearlite-attached polyethylene network media and the expanded polypropylene media according to the present invention, the pearlite-polyethylene network media is manufactured by applying a polyurethane resin adhesive to the polyethylene network and then attaching pearlite. do.

Description

Purification apparatus and process for streamwater using Pearlite attached Polyethylene Net and Bulged Polypropylene media}

The present invention relates to a river water purification apparatus and a method, and more particularly, to filter high concentration polluted river water into which organic sewage, such as domestic sewage, flows, and to filter perlite having excellent microbial adhesion properties between polyethylene networks. Is installed in the reaction tank, and the oxygen is supplied from the front end of the lower module of the reactor to give a certain time of stay, and the biofilm reaction tank and the expanded polypropylene which maximize the oxidation, aggregation and precipitation effect by the microorganisms attached to the media are deposited. The present invention relates to a polluted river water purification apparatus and a method using a perlite-attached polyethylene network filter media and expanded polypropylene filter media including a biofilm filter tank having a biofilm filter function.

Previously developed river water purification technologies have a low surface area of the media and have a large site area, and if the BOD load is higher or lower than a certain level, the treatment efficiency is lowered. Of concern is high. In addition, the gravel contact oxidation method, which is a river purification technology applied to the existing stream, has a disadvantage in that the pore ratio of the reaction tank is low, so that the amount of processing per unit time is limited, which requires a lot of land area, and the pores are closed as the biofilm increases. . In addition, the gravel contact oxidation method has a problem in that the exfoliated biofilm is accumulated in the filter media layer, which is difficult to discharge to the outside, and the sludge is reversely injured and excessively detached when the bottom aeration is performed directly under the filter media.

Therefore, especially the structure and system improvement to prevent the closing of voids should be urgently solved. Above all, the specific surface area of the media is increased to show stable treatment efficiency even in high concentration polluted river water, and it can be applied to small rivers with relatively little exclusion space. It is necessary to develop a river water purification method.

The present invention is to solve the problems such as extreme changes in treatment efficiency according to the organic load changes of the conventional river water purification technology, sludge closing of the filter media, resuspension of sludge in the sedimentation basin, low throughput per unit time due to small reactor voids It is an object of the present invention to apply a pearlite-attached polyethylene network medium having a maximum specific surface area in order to improve the purification ability of the biofilm and to secure a high porosity, and in order to prevent excessive detachment of the adherent microorganisms, stepwise abandonment between the medium accumulation portion Introducing a method, and by installing a biofilm filtration tank equipped with a biofilm filtration function by expanded polypropylene in the final sedimentation basin to prevent spillage due to sludge injury in the final effluent, it is possible to stably treat high concentration of contaminated river water. Mesh Media and Foamed Polypropylene Media Used to provide a contaminated river water purification apparatus and method.

In order to achieve the object as described above, the polluted river water purification apparatus using the pearlite-attached polyethylene network filter medium and the expanded polypropylene filter medium according to the present invention, the high concentration polluted river water purification is formed by linking the sedimentation tank, biofilm reaction tank, and biofilm filtration tank A stream water purification apparatus for a water purification apparatus, wherein a module loaded with a pearlite-attached polyethylene network medium having pearlite adhered between polyethylene networks in order to increase porosity and specific surface area is installed inside the biofilm reactor, and the biofilm reactors have lower ends of each module. The stepped aeration method in which the air supply is made at the shear surface, the biofilm filtration tank is characterized in that the filtration tank having a physical filtration function by filling the expanded polypropylene filter medium in the existing sedimentation basin.

In the polluted river water purification apparatus using the pearlite-attached polyethylene network media and the expanded polypropylene media according to the present invention, the pearlite-polyethylene network media is manufactured by applying a polyurethane resin adhesive to the polyethylene network and then attaching pearlite. do.

In the polluted river water purification apparatus using the pearlite-attached polyethylene network filter and the expanded polypropylene filter according to the present invention, the module in the reactor is the pearlite-attached polyethylene network filter with a suspension type at intervals of 1 cm to 5 cm, more preferably 2 cm. To be installed at intervals of 3cm to constitute one unit module.

In the polluted river water purification apparatus using the perlite-attached polyethylene network filter medium and the expanded polypropylene filter medium according to the present invention, the stepwise aeration method is used to prevent excessive detachment of the adherent microorganisms and resuspension of sludge. It is characterized in that the reaction chamber and the deposition chamber separating plate is installed, and the diffuser is installed on the upper portion to inject air.

In the polluted river water purification device using the pearlite-attached polyethylene network filter medium and the expanded polypropylene filter medium according to the present invention, the purification device discharges sludge deposited in the sedimentation tank, the biofilm reaction tank, and the deposition chamber at the bottom of the biofilm filtration tank for each reactor, Or at the same time characterized in that the collecting pipe and the pump is further installed to enable the discharge.

Polluted river water purification method using a pearlite-attached polyethylene network media and expanded polypropylene media according to the present invention, the contaminated river water flows into the settling tank for a predetermined time; (B) inducing the inflow water passed through step (a) into a biofilm reactor to induce oxidation, aggregation, and precipitation by microorganisms; And (c) treating the contaminated river water by introducing the treated water that has undergone the step (b) into a biofilm filtration tank having a biofilm filtration function in an existing sedimentation basin in order to prevent leakage due to sludge injuries. As a method for purifying river water for purification, a module loaded with a pearlite-attached polyethylene network medium, in which a pearlite is attached between polyethylene networks in order to increase porosity and specific surface area, is installed in the biofilm reactor in step (b). The biofilm reaction tank is a step-aeration method in which air is supplied from the lower end face of each module, and the biofilm filtration tank of step (c) is characterized by having a physical filtration function by filling the expanded polypropylene media into an existing sedimentation basin.

In the polluted river water purification method using the pearlite-attached polyethylene network filter medium and the expanded polypropylene filter medium according to the present invention, the step (c) increases the removal efficiency of organic matter by the microorganisms attached to the filter medium, In order to backwash, air is supplied.

In the polluted river water purification method using the pearlite-attached polyethylene network filter medium and the expanded polypropylene filter medium according to the present invention, the method further comprises screening the polluted river water before the step (a).

Hereinafter, a contaminated river water purification apparatus and a method using a pearlite-attached polyethylene network filter medium and a foamed polypropylene filter medium according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view and a side view of a polluted river water purification apparatus using a pearlite-attached polyethylene network filter medium and a foamed polypropylene filter medium according to the present invention. The purification apparatus of the present invention is composed of a primary sedimentation tank, a reaction tank, and a sedimentation basin as in the conventional process, but in order to enhance the treatment and filtering function of the high concentration of contaminated river water by biofilm, the polypropylene media is charged into the existing sedimentation basin.

In particular, the biofilm reaction tank of the present invention is applied to the filter medium by a stepped aeration method of loading the filter medium with a pearlite having good microbial adhesion properties between the polyethylene network and supplying air to the front end face of each module. The detachment of attached microorganisms was minimized to distinguish them from other contact oxidation methods. In addition, the sludge deposited in the sedimentation chamber, the biofilm reaction tank, and the deposition chamber at the bottom of the biofilm filtration tank is simultaneously discharged to a collecting pipe furnace using a pump.

In the present invention, as shown in Fig. 2 (a), a filter medium having a large specific surface area and easy to attach microorganisms to a reaction tank is attached to a medium using a polyurethane resin adhesive having a purity of 100% between polyethylene networks. ) And a module arranged at a predetermined interval using the aluminum fixing rod 23 in a suspension type (see Fig. 2 (b)), and installed in the reactor.

While the porosity of the module using contact media (gravel, tire, waste concrete, etc.) used in the existing river water purification technology is around 40%, the module according to the present invention has a high porosity of 95% or more. In addition, by maximizing the specific surface area of the module according to the present invention, by increasing the amount of adherent microorganisms can be expected to have a very high purification effect on the removal efficiency of particulate contaminants and dissolved pollutants. In particular, the present invention is easy to maintain by installing the pearlite-based polyethylene network medium as a unit module that is easy to install and dismantle.

In the present invention, the oxygen supply for the biofilm is an excessive microorganism generated at the front aeration of the media by adopting a stepped aeration method by installing the diffuser in the upper part of the reaction tank and the deposition chamber separator 12 in the front of the lower module in the tank Solving the problem of desorption, sludge resuspension, and lowering of sedimentation efficiency, the sludge or sediment detached from the module was easily settled into the sludge deposition chamber (11), and it was possible to discharge and simultaneously discharge each reactor.

The objects, features and advantages of the present invention will become more apparent upon a review of the description of the preferred embodiments of the present invention.

Example 1 Manufacture of Perlite Polyethylene Network Media

The pearlite-attached polyethylene network medium used in the present invention is prepared by applying a 100% polyurethane resin adhesive to the polyethylene network 21 and then attaching pearlite 22. As shown in Fig. 2 (b), the unit media prepared in this way was configured in one unit module by installing a suspension type at intervals of 2 to 3 cm, each unit module is lattice stacked in the reactor.

The present invention, as shown in Figure 3 (a), for the high concentration polluted river water purification, to perform oxidative decomposition by microorganisms in the sedimentation basin, and to remove the sludge flowing out from the reaction tank, the perforated plate 32 The expanded polypropylene (31) was charged onto the bed, and the treated water of the biofilm reaction tank (3) was filtered by natural oil using the water head difference between the biofilm reaction tank (3) and the filtration tank (4), and the perforated plate channel (see Fig. 3 (b)). ), Which is different from other methods by adding biological oxidation and physical filtration to the filtration tank. That is, the biofilm filtration tank of the present invention is a filtration device filled with porous particles made of expanded propylene, which is robust against friction, has a specific gravity of 0.5 or less, has good flowability to water flow, and has a rough surface, and has good microbial adhesion. By linking it to a bioreactor, it prevents sludge flotation from the settling basin and adds biooxidation and decomposition effects and physical filtration following air injection. In addition, the present invention not only increases the removal efficiency of the organic matter by the microorganisms attached to the filter medium 6 by supplying air in the filtration tank, but also enables backwashing according to the head loss of the filtration tank.

4 is a process chart of the river water purification process according to the present invention combining a biofilm reaction tank using a perlite polyethylene network filter medium and a filtration tank containing an expanded polypropylene filter medium.

Although the present invention has been described in detail with reference to the embodiments and the illustrated drawings, it is apparent to the inventors that various modifications and changes are possible within the scope and spirit of the present invention, and such modifications and modifications are attached thereto. It is also natural that the claims belong.

As described above, the polluted river water purification apparatus and the method using the pearlite-attached polyethylene network media and the expanded polypropylene media, according to the present invention, are continuously disposed at an appropriate interval in consideration of the fluid and air flow in the reactor. And then modularized into one, and then placed in a reaction tank considering the characteristics of inflow water quality along the stream, and internal and external environmental conditions such as fluid flow and air flow, and using a filter tank filled with expanded polypropylene instead of a sedimentation basin. In addition, the most efficient water purification facilities can be maintained. In addition, the present invention is designed to be able to easily modify the loading method of the module according to the environmental change to compensate for the change in the inflow flow or the condition of the water quality.

In general, the aeration method used in river water purification technology is the bottom aeration method. When using a lower aeration method, that is, a shear aeration method, the sludge floating phenomenon occurs, there is a problem that the precipitation rate of the solid (SS) is reduced. In the present invention, the stepped aeration method, which is the form of aeration at the bottom of the front end surface of each unit module, prevents excessive detachment of microorganisms and solves the problem of sludge resurfacing.

According to the present invention, the pearlite-based polyethylene network media reactor and the expanded polypropylene filtration apparatus can reduce the size of the water purification plant by about 1/2 or more by increasing the porosity and the specific surface area. As described above, the present invention is a suitable method for small rivers in Korea that can not be excluded because it requires less land area due to the small size of the facility, and the present method is applied to the sewage drainage runoff and polluted river water treatment to be discharged into the rivers and discharged into the rivers. It can be used as a river water purification technology that can improve sulfur.

The present invention improves the removal rate of dissolved organic matter than the conventional gravel contact oxidation method due to the increase in the amount of adherent microorganisms, for example, the existing gravel contact oxidation method can be applied at a BOD load of 10-30 mg / L, the present invention is 10 mg BOD load It is applicable to below / L and above 70 mg / L, which is resistant to BOD load fluctuations. In addition, the present invention is designed to prevent the sludge excessive sedimentation and reduction of porosity of the front end portion, and also to prevent the closure of the media by the sludge, by replacing the sedimentation basin with a biofiltration tank, organic matter by biooxidation and physical filtration A removal function was added to solve the problem of sludge flotation in the settling basin.

In addition, the present invention exhibits a stable buffer treatment efficiency because of its excellent physical and chemical properties as compared to the media used in the conventional catalytic oxidation method, the buffer capacity against severe influx load fluctuations is excellent. In addition, the media of the present method is characterized by excellent water permeability and air permeability, deepening the aerobic microorganism active layer, strengthening the bio-oxidative power and reduced sludge generation amount.

1 is a plan view and a side view of a polluted river water purification apparatus using a pearlite-attached polyethylene network filter medium and a foamed polypropylene filter medium according to the present invention.

Figure 2 (a) is a cross-sectional view of the pearlite-attached polyethylene network media in the biofilm reactor used in the present invention, Figure 2 (b) shows a module of the pearlite-attached polyethylene network media.

Figure 3 (a) is a block diagram of a filtration tank containing the expanded polypropylene filter media of the polluted river water purification apparatus according to the present invention, Figure 3 (b) shows a treated water outflow porous plate channel of the filtration tank.

Figure 4 is a process chart of applying the polluted river water purification method using a pearlite-attached polyethylene network media and expanded polypropylene media according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: primary sedimentation tank 2: diffuser

3: biofilm reactor 4: biofilm filtration tank

5: polyethylene network media with pearlite

6: filtration tank containing foamed polypropylene filter media

7: Treated water outflow porous plate channel 8: Sludge discharge pump

9: influent water pump 10: air blower (Blower)

11: sludge deposition chamber 12: reaction vessel and deposition chamber separation plate

Claims (8)

As a river water purification device for the purification of high concentration polluted river water composed of a sedimentation tank, a biofilm reaction tank, and a biofilm filtration tank, Inside the biofilm reactor, a module loaded with a pearlite-attached polyethylene network medium, in which pearlite is attached between polyethylene networks to increase porosity and specific surface area, is installed. The biofilm reactor is a step-type aeration method in which air is supplied from the lower end face of each module, The biofilm filtration tank is a filtration tank having a physical filtration function by filling the expanded polypropylene filter medium in the existing sedimentation basin, characterized in that the polluted river water purification apparatus using a polyethylene network filter medium and expanded polypropylene filter medium. The method of claim 1, The pearlite-attached polyethylene network media is a polluted river water purification apparatus using a pearlite-attached polyethylene network media and a foamed polypropylene media, characterized in that the periphery is produced by applying a polyurethane resin adhesive to the polyethylene network. The method of claim 1, The module in the reaction tank is a polluted river water purification device using a pearlite-attached polyethylene network media and expanded polypropylene media, characterized in that the pearlite-attached polyethylene network media is suspended at intervals of 1 cm to 5 cm to form a unit module. . The method of claim 1, In the step-aeration method, in order to prevent excessive detachment of the adherent microorganisms and sludge re-injury, the reaction chamber and the deposition chamber separator are installed on the front end face of each module, and the diffuser is installed on the upper part to inject air. Polluted river water purification apparatus using a perlite polyethylene network filter medium and expanded polypropylene filter medium characterized in that the method. The method of claim 1, The purifying apparatus discharges sludge deposited in the sedimentation chamber, the biofilm reaction tank, and the deposition chamber at the bottom of the biofilm filtration tank for each reaction tank, or is provided with a collecting pipe passage and a pump so that simultaneous discharge is possible. And polluted river water purification apparatus using expanded polypropylene media. (A) allowing the contaminated river water to flow into the settling tank for a certain time; (B) inducing the inflow water passed through step (a) into a biofilm reactor to induce oxidation, aggregation, and precipitation by microorganisms; And Purifying the high concentration polluted river water, comprising the step (c) of treating the contaminated river water by introducing the treated water that passed through the step (b) into a biofilm filtration tank having a biofilm filtration function in an existing sedimentation basin to prevent leakage due to sludge injuries. As a river water purification method for, Inside the biofilm reactor of step (b), a module is loaded with a pearlite-attached polyethylene network filter, in which pearlite is attached between polyethylene networks in order to increase porosity and specific surface area, and the biofilm reactor is a front end face of each module. Stepped aeration method in which the air supply is The biofilm filtration tank of the step (c) is filled with expanded polypropylene filter medium in the existing sedimentation basin, characterized in that it has a physical filtration function, characterized in that the polluted river water purification method using a polyethylene network filter medium and expanded polypropylene filter media. The method of claim 6, The step (c) is to increase the removal efficiency of the organic matter by the microorganisms attached to the filter medium, in order to backwash according to the loss of the head of the filter tank, the air is supplied with a polyethylene film filter medium and expanded polypropylene media with a pearlite Polluted river water purification method using The method of claim 6, Screening the polluted river water before the step (a), characterized in that it further comprises the step of polluted river water purification method using a perlite-attached polyethylene network media and expanded polypropylene media.